A workaround (in 12.04 LTS) is to send espeak output to stdout, and pipe
through paplay. This removes the delay and error messages.
$ time echo hello|espeak
ALSA lib pcm_dmix.c:1018:(snd_pcm_dmix_open) unable to open slave
[... tons more error lines ...]
real 0m22.684s
user 0m0.036s
sys 0m0.036s
$ time echo hello | espeak --stdout | paplay
real 0m1.106s
user 0m0.000s
sys 0m0.020s
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https://bugs.launchpad.net/bugs/1025578
Title:
espeak sound output very slow if bluez-alsa installed
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